Description of problem: This is a kernel regression. After grub the screen goes completely black but computer is running. 3.3.0-8.fc17.x86_64 only works with kernel parameters: i915.modeset=1 acpi_backlight=vendor Version-Release number of selected component (if applicable): 3.3.0-8.fc17.x86_64 How reproducible: Boot computer Steps to Reproduce: 1. 2. 3. Actual results: Should work out of the box Expected results: Additional info: Old kernel from Fedora 17 Alpha ISO work out of the box. 3.3.0-0.rc3.git7.2.fc17.x86_64 (Works without the above kernel parameters)
modeset is enabled by default, so the i915.modeset=1 shouldn't be needed. If you only specify acpi_backlight=vendor, does it work? Can you provide the output of acpidump from this machine?
Created attachment 575495 [details] ACPI Dump ACPI dump from HP Folio 13 laptop
(In reply to comment #1) > modeset is enabled by default, so the i915.modeset=1 shouldn't be needed. If > you only specify acpi_backlight=vendor, does it work? > > Can you provide the output of acpidump from this machine? You were right. acpi_backlight=vendor is enough.
Can you boot the machine with 'drm.debug=4' on the kernel command line, and ssh in and attach dmesg from that?
Created attachment 585741 [details] dmesg with drm.debug=4 enabled This is the HP Folio 13 (model: 2000) booting the EL6.2 kernel with kernel option drm.debug=4 as it is now installed on this laptop and experiencing the exact same problem. I could probably boot the Fedora live cd and get this info from there if you need it.
Please do, as the code is very different.
Created attachment 594952 [details] dmesg from Fedora17live with drm.debug=4 enabled
Are you still having issue with this on 3.8.2 in updates-testing?
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